28049631 has 8 divisors (see below), whose sum is σ = 38269440. Its totient is φ = 18264792.

The previous prime is 28049611. The next prime is 28049633. The reversal of 28049631 is 13694082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28049631 - 2¹¹ = 28047583 is a prime.

It is a super-2 number, since 2×28049631² = 1573563598472322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28049592 and 28049601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28049633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108591 + ... + 108848.

It is an arithmetic number, because the mean of its divisors is an integer number (4783680).

Almost surely, 2^28049631 is an apocalyptic number.

28049631 is a deficient number, since it is larger than the sum of its proper divisors (10219809).

28049631 is a wasteful number, since it uses less digits than its factorization.

28049631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217485.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 28049631 is about 5296.1902344988. The cubic root of 28049631 is about 303.8382066985.

It can be divided in two parts, 28049 and 631, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 28049631 in words is "twenty-eight million, forty-nine thousand, six hundred thirty-one".